[
https://issues.apache.org/jira/browse/HDFS-10336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15352687#comment-15352687
]
Rakesh R commented on HDFS-10336:
---------------------------------
Thanks [~linyiqun] for the contribution. Could you please rebase the patch as
HADOOP-13251 has modified {{UserGroupInformation#reset}} code.
bq. 1st. The test TestBalancer#testBalancerWithKeytabs executed timeout.
Increasing timeout is one approach, but am interested to know the reason behind
300000millis timeout. Did you see any specific case for exceeding the current
value?
bq. 2nd. The test TestBalancer#testBalancerWithKeytabs reset the UGI not
completely sometimes in the finally block.
+1 for {{UserGroupInformation.reset();}}
> TestBalancer failing intermittently because of not reseting
> UserGroupInformation completely
> -------------------------------------------------------------------------------------------
>
> Key: HDFS-10336
> URL: https://issues.apache.org/jira/browse/HDFS-10336
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0-alpha1
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: HDFS-10336.001.patch
>
>
> The unit test {{TestBalancer}} failed sometimes.
> I looked for the reason. I found two main reasons causing this.
> * 1st. The test {{TestBalancer#testBalancerWithKeytabs}} executed timeout.
> {code}
> org.apache.hadoop.hdfs.server.balancer.TestBalancer
> testBalancerWithKeytabs(org.apache.hadoop.hdfs.server.balancer.TestBalancer)
> Time elapsed: 300.41 sec <<< ERROR!
> java.lang.Exception: test timed out after 300000 milliseconds
> at java.lang.Thread.sleep(Native Method)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher.waitForMoveCompletion(Dispatcher.java:1122)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher.dispatchBlockMoves(Dispatcher.java:1096)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher.dispatchAndCheckContinue(Dispatcher.java:1060)
> at
> org.apache.hadoop.hdfs.server.balancer.Balancer.runOneIteration(Balancer.java:635)
> at
> org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:689)
> at
> org.apache.hadoop.hdfs.server.balancer.TestBalancer.testUnknownDatanode(TestBalancer.java:1098)
> at
> org.apache.hadoop.hdfs.server.balancer.TestBalancer.access$000(TestBalancer.java:125)
> {code}
> * 2nd. The test {{TestBalancer#testBalancerWithKeytabs}} reset the {{UGI}}
> not completely sometimes in the finally block. And this affected the other
> unit tests threw {{IOException}}, like this:
> {code}
> testBalancerWithNonZeroThreadsForMove(org.apache.hadoop.hdfs.server.balancer.TestBalancer)
> Time elapsed: 0 sec <<< ERROR!
> java.io.IOException: Running in secure mode, but config doesn't have a keytab
> at org.apache.hadoop.security.SecurityUtil.login(SecurityUtil.java:300)
> {code}
> And there were not only one test will be affected by this. We should add a
> line to do before doing reset {{UGI}} operation and can avoid the potenial
> exception happens.
> {code}
> UserGroupInformation.reset();
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
